"On January 30, 2014 Tesla Motors embarked on the journey of a lifetime. The plan was to drive two Model S sedans across the United States, powering them for free on the newly completed cross-continental Supercharger network. In addition, the team would set the world record for charge time of an electric vehicle driving the across the US."

Says Tesla Motors in describing the video posted here..

Details of the entire Tesla Model S cross-country rally can be found in our previous posts: